python 数字排序

#encoding=utf-8 print '中国' #根据字符串中的数字排序，如f10应该在f2后面 import re re_digits = re.compile(r'(\d+)') def emb_numbers(s): pieces=re_digits.split(s) pieces[1::2]=map(int,pieces[1::2]) return pieces def sort_strings_with_emb_numbers(alist): aux = [(emb_numbers(s),s) for s in alist] aux.sort() return [s for __,s in aux] def sort_strings_with_emb_numbers2(alist): return sorted(alist, key=emb_numbers) filelist='file10.txt file2.txt file1.txt'.split() print filelist print '--DSU排序' print sort_strings_with_emb_numbers(filelist) print '--内置DSU排序' print sort_strings_with_emb_numbers2(filelist)

打印结果如下：

中国 [‘file10.txt’, ‘file2.txt’, ‘file1.txt’] –DSU排序 [‘file1.txt’, ‘file2.txt’, ‘file10.txt’] –内置DSU排序 [‘file1.txt’, ‘file2.txt’, ‘file10.txt’]